yade-users team mailing list archive

[Fu zuoguang <question230139@xxxxxxxxxxxxxxxxxxxxx>]

Question #230139 on Yade changed:
https://answers.launchpad.net/yade/+question/230139

    Status: Answered => Open

Fu zuoguang is still having a problem:
Dear Christian Jakob and all users:
          Long time no see and thanks for helping last time, I can do some analysis with 2D clumps now buy at the same time find some problems with DOF for those. Following my comprehension, all the centroids of spheres(particles)  should be at the same geometric surface during the entire time of simulation but this is no in fact.  So my all problems can be shown as that:

(1).After the clumps generation finishing, the state is just like that(the beginning of my simulation):
http://i.imgur.com/ZgTCuhW.png 

(2).My test simulation is compose of a large number of clumps and 4 fixed wall and all clumps should getting a free falling since 
they have contacts with the bottom wall or some other ones  below them. If use no function for DOF, the state of my finished tast is of course as that(this is 3D simulation):
http://i.imgur.com/ElBAWMJ.png

(3).After that above, I have another try for employing a function your
told me last time for DOF , which can be described as:

def DOF(): # of course, DOF condition only for 2D simulation

    for b in O.bodies:
        if b.isClump:
           b.state.blockedDOFs = 'zXY'

and  the state of my finished tast this time is of course as that:
http://i.imgur.com/h0LuITR.png

This can demonstrate obviously that this function does the positive effect for DOF. But I also find that all the centroids of spheres are not in the same plane by checking the status displayed by YADE just in Y-Z plane. It is as that:
http://i.imgur.com/q11ISgH.png

I think there is nothing wrong in what I just said above. But I am not
sure the reason of it and it could do harm for my simulation.

Seeking for your help!

-- 
You received this question notification because you are a member of
yade-users, which is an answer contact for Yade.